Python: Concatenate element-wise three given lists

Last update on February 22 2025 10:56:59 (UTC/GMT +8 hours)

Concatenate Lists Element-Wise

Write a Python program to concatenate element-wise three given lists.

Visual Presentation:

Sample Solution:

Python Code:

# Define a function called 'concatenate_lists' that concatenates elements from three lists 'l1', 'l2', and 'l3' element-wise.
def concatenate_lists(l1, l2, l3):
    # Use a list comprehension with 'zip' to concatenate elements from each of the input lists.
    return [i + j + k for i, j, k in zip(l1, l2, l3)]

# Create three lists 'l1', 'l2', and 'l3' containing string elements.
l1 = ['0', '1', '2', '3', '4'] 
l2 = ['red', 'green', 'black', 'blue', 'white']
l3 = ['100', '200', '300', '400', '500'] 

# Print messages indicating the original lists.
print("Original lists:")
print(l1)
print(l2)
print(l3)

# Print a message indicating the intention to concatenate the three lists element-wise.
print("\nConcatenate element-wise three said lists:")

# Call the 'concatenate_lists' function to concatenate the lists 'l1', 'l2', and 'l3' element-wise and print the result.
print(concatenate_lists(l1, l2, l3))  

Sample Output:

Original lists:
['0', '1', '2', '3', '4']
['red', 'green', 'black', 'blue', 'white']
['100', '200', '300', '400', '500']

Concatenate element-wise three said lists:
['0red100', '1green200', '2black300', '3blue400', '4white500']

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to concatenate element-wise three given lists with a custom separator between elements.
• Write a Python program to concatenate element-wise multiple lists of varying lengths, truncating to the shortest list.
• Write a Python program to concatenate element-wise two lists after converting all numeric elements to strings.
• Write a Python program to concatenate element-wise four lists and then reverse each concatenated string.

Python Code Editor:

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